The Double Stuff is a very good option. It's similar in size to the DC4 but is a finer grit, allowing you to get a really good edge on your blade. I believe that you can also get a finer grit, ceramic version of the DC4, made by Falkniven as well. It might be a good option if you want something to re-establish an edge rather something to abrade your way through a steel girder.I've been considering getting a Spyderco double stuff. I'm no expert on this, so by all means take this with a pinch of salt.